Chii Takes Shelter From Rain.
Chi is soaking wet from the rain. She goes with Tama-san to look for someplace to stay dry. Source: crunchyroll
Aired 09/07/2009EP 60 - Chii Takes Shelter From Rain.

2009
Chi's Sweet Home - Chi's New Address
Chi is still living with the Yamada family, but they decide it isn't fair to force her to hide indoors in their "no pets allowed" apartment. So they decide there is only one thing to be done, Chi must move away for her own happiness.